Writing instrument



Jan.. 20, 1925- 1,523,904

. R. sATo WRITING INSTRUMENT Filed Feb. l2 1924 .15 instant use, an

/l` provide a double fountain fountain Patented Jan. 20, .1925.

A UNITED sTATEs PATENT oFFlcE';

RYUJ'I SATO, 0F NEW YORK,j N. Y.

wn'rINe INSTRUMENT.

, Application filed February 12, 1924. Serial N'o, 692,335.

To all whom. tmc'y concern.' l

' Be it known vthat I, RYUJI SATO a citizen of Japan, residing at New York clty, in the county .of New York anch State of New York, have invented new and useful Im-Ay provements in Writing Instruments, of

which the` following is a specification.

v This inventionrelates -toA writing instruz ments and .more particularly to a double The principal obj'ecti'of the invention is the provision of a writing instrument wherev in there is embodied two pens for permitting two different st le p en points or nibs for dy which pen points receive their supply of ink from a single reservoir., Another object of the inventlon is to proi `vide a double ountain pen which includes suitable caps for protectin the pen nibs when not in use, andlfor sea ing the leakage the caps arey in position on their respective l pointed out in t of ink from the reservoir to the pen` when Linvention resides in certain novel Iconstrucv whichz- Figu tion and combination` and arrangement of parts, the essential features of which are hereinafter fullyl described, are particularly e appended clalms, and are illustrated in the accompanying drawing, in

re 1 is an elevation of myf invention showingsone of 'the caps 'removed and i telescopic engagement with the other cap.v

Figure 2 1s a vertical lon itudinal sectional'view on theline 2`2 o Figure 1.

Figure 3 is a detail sectional view through one-of thecaps showing themeans for sealing the escape of ink from the nib.

'Figure 4 is a. transverse sectional view on 'the hne 4-4 of Figure 3.

Fi re 5' is a transverse sectional view on theflme 5-5 of Figure 2.

Figure 6- is a detail view partly in section of the refill member.

Referrin more particularly to the drawing, the re erenc'e numeral 10 designates my improved writing instrument in its entirety fbe. seen that two which includes a casing 11 provided at op-A posite ends with pen sections '12. Caps 13 close the ends of the pen sections and each cap is reduced at its outerend as at 14 so as to be capable of telescopic engagement with each other wheneither pen section is uncovered for writing purposes. The tubular member 11 has its ends reduced and f externall screw threaded as at 15 for'coaction with an internally threaded A 16 formed on a holder 17, which hol er con-v stitutes holder is 'also provided with an annular flange 18 which is spaced from the internally threaded portion `16 and encircles the end of a refill tubular member 19 containing a supply of ink and which member is opened -at opposite ends :for communication with a duct 20- in each ofy the holders 17. The other end of each duct opens'against a pen nib 21 carried by the holder 17. -A shank or ex- |tension 22 projects from the holder and supports thev pen mib in the usual manner; With reference to Figure 6,.it will be seen .that Stoppers 23 close the refill tubular'memi 80 ber 19 prior to its insertion in the casin 11 and the same mayl be manufactured and sold in thismanner, so that a new supply of ink may be laced in the casing when the former su p has been exhausted.

To prevent ea `age of-ink from the pen sectionsinto the caps 1&3 when the device is being carried inthe pocket, I provide the inner walls of each cap with a pair ci yieldable blocks 24 in the nature of a soft rubber or cork, between which the nib 21 and the ortion i' part of each pen section 12. Each l shank 22-is adapted tobe received. llVhen` the caps have been applied to close the ends of the pen sections, the nib and shank will be brought into clampin engagement with each other in order to c ose'the duct 20 to prevent the How of ink to the nib.

From the foregoing descri tion, it will iferent sty e nibs or pen points may be embodied in a single writlng instrument, and which nibs receive their supply of ink from a single reservoir. I

While I have 'described what I- deem to be the most desirable embodiment of my invent-iin, it is obvious 'that many of the details may be variedjwithout 1n any way departing from lthe spiritof my invention,r

and I therefore do` not limit myselfto the nor to anything less than the whole ofm invention limited only by the appendc claims.

, What is claimed as new is 1. A writing instrument comprising a. casing having a n sectionat each end thereof, and a sing e reservoir su ported by said sections for supplying ink 't creto.

u 2. A writing instrument comprising a Casing. having a pen section at each end thereo single removable reservoir supported by said sections for supplying ink 3. A writing instrument comprising a casing, u pen sect-ion attached to said casing at opposite ends thereof, a tubular member containing a charge of ink insertnble in said casing and supported therein by said pen sections, a pen nib carried by each of said pen sections, and a bore in each pen section communicating' with said tubular member and sziid'pen nib for supplying ink thereto.

In testimony whereof I have nixed my signature.

thereto, and means forsealin the flow of ink to said sections when not Y1n use.'

RYUJI SATO. 

